活化过硫酸钠/多壁碳纳米管降解氯苯的研究

Degradation of Chlorobenzene in Aqueous by Sodium Persulfate Activated by Ferrous Ion and Multi-walled Carbon Nanotubes

文章通过制备稳定悬浮的多壁碳纳米管(MWCNTs),以氯苯为处理对象,研究了亚铁离子活化过硫酸盐(Fe2+-SP)和MWCNTs的组合降解实验。考察了反应时间、p H值、MWCNTs浓度和重复使用次数等因素对降解氯苯的影响。实验结果表面,在初始pH值为7,硫酸亚铁浓度为5 mmol/L,过硫酸钠浓度为10 mmol/L,MWCNTs为10 mg/L,反应时间为60 min的条件下,对浓度为40 mg/L的氯苯去除率可到93%,比单独使用Fe2+-SP高11%。溶液p H能影响降解效果,初始p H为7的条件下,处理效果较好。进一步实验表明,MWCNTs具有良好的重复使用能力。

Multi-walled carbon nanotubes（MWCNTs）were purified and dispersed in aqueous solution. Advanced oxidation processes with Fe^2＋/Na2S2O8 and MWCNTs were applied to treat chlorobenzene in aqueous. The effect of reaction time,p H value,MWCNTs dosage and usage frequency on the degradation efficiency were systematically investigated. Result showed that the chlorobenzene degradation efficiency of Fe^2＋-SP/MWCNTs system was 11% higher than that of the system with only Fe^2＋-SP,when the chlorobenzene concentration was 40 mg/L within 60 min under the conditions of Fe^2 ＋ concentration 5mmol/L,Na2S2O8 concentration 10 mmol/L,MWCNTs dosage 10 mg/L,and initial solution p H 7. The optimum treatment efficiency was achieved after 60 minutes when p H reaches 7. Moreover,MWCNTs was demonstrated to have good reusability.